毕业设计(论文)课 题 名 称 自动灌溉控制器的设计 学 生 姓 名 学 号 系、年级专业 指 导 教 师 职 称 2025 年 5 月 30 日摘 要近几年来，随着水资源的日趋紧张，世界各国都在积极探究行之有效的节水途径和措施。自动灌溉技术是为了解决水资源不足，提高灌溉效率而进展起来的现代灌溉技术之一。本文设计了一个自动灌溉控制器，该系统以 AT89C51 单片机为控制核心，采纳模块化的设计方案，由湿度采集模块、步进电机控制模块、键盘接口模块和显示模块组成。湿度采集模块以探针式电容湿度传感器为核心，步进电机控制电路模块采纳了达林顿驱动芯片 ULN2803，显示电路模块主要由 LCD12864 构成。在闭环（自动）模式下，该系统能自动对土壤的湿度进行检测，当实际湿度低于警戒值时单片机自动启动步进电机进行灌溉。在时间（手动）模式下，可通过键盘设置灌溉的时间，超过该时间，则停止灌溉。关键词：AT89C51；探针式电容湿度传感器；ULN2803 达林顿驱动；LCD12864 ABSTRACTIn recent years, along with the freshwater getting less, all countries in the world actively explore effective ways and measures to save water. Automatic irrigation technology is one of the modern irrigation technologies to deal with the water shortage, improving irrigation efficiency.This paper designs an automatic irrigation controller. The system use AT89C51 as control core, with modular design scheme. There are four modules: humidity acquisition module, the stepper motor control module, keyboard interface module and display module. Humidity acquisition module mainly uses probes type capacitor humidity sensors as the core; stepping motor control circuit module uses the ULN2803 drive chip linton; display circuit module mainly composed by LCD12864. In the loop (automatically) mode, this system can detect soil moisture. When actual humidity is lowwer than vigilance value, microcontroller automatic startup stepper motor to irrigat. In time (manual) mode, users can set the time through the keyboard.whe...
